I learned long ago that Astronomy is very weather dependant and highly unpredictable. Good nights of seeing can come on very short notice and still be weeks or months apart. So I developed what I call my Go box. In it are fall the small essential items that I will need and a few spare parts and simple tools. The items in the box live in the box. If I need them at home I always put them back in the box or get another copy of the item for around the house use. The box sits next to my eyepiece case which has my eyepieces, the telrad (another often forgotten item) and a set of spare batteries. When it's time to "GO" , I load the car with the large obvious pieces of the telescope and on the last trip I pick up the eyepiece case and the Go box and load them up. Then I make one last sweep of the residence looking for anything the might have been left behind. It may be star charts or even truss tubes but the final sweep before departure has saved my bacon more than once. Oh and my eyepiece case has a spare set of Meade Plossls eyepieces and a 2" adapter to loan to those who left their eyepieces at home. So I've saved other people's bacon too. At the other end of the event. I tend to stay until every one else is packed up and leaving and then I do a walk through of the site with a bright white light flashlight looking for anything shinny that was left on the ground. I also pick up trash that was thoughtlessly left behind, though I do draw the line at used diposable diapers. DT